The diagram shows a battery linked to a potential divider and two lamps, P and Q. The slider on the potential divider is shifted from end X to end Y of the resistor. Which row indicates the effect on the brightness of each lamp?
- Abrightness of P: brighter; brightness of Q: brighter
- Bbrightness of P: brighter; brightness of Q: dimmer
- Cbrightness of P: unchanged; brightness of Q: brighter
- Dbrightness of P: unchanged; brightness of Q: dimmer